JPH0350435A - Air conditioner - Google Patents

Abstract

PURPOSE:To keep a room temperature substantially at a constant level without having any relation to season by a method wherein a discrimination control part for changing over a range of angle where a blowing direction is varied in response to a temperature difference between a feeding air temperature sensor and a room temperature sensor is provided. CONSTITUTION:A vane 3 is arranged near a blowing port within a blowing box 1. The vane 3 is rotatable around an axis parallel with an opening surface of a blowing port 2 and its slant angle is respect to an opening plane in the blowing port 2 is variable. A slant angle of the vane 3 in respect to the opening plane of the blowing port 2 is varied to cause a blowing direction of the feeding air to be varied. A fed air temperature sensor 4 for use in sensing a temperature of the fed air is arranged in the blowing box 1, and a room temperature sensor 4 for use in sensing a room temperature is arranged at a ceiling surface at a location spaced apart from the blowing port 2. Outputs from the fed air temperature sensor 4 and the room temperature sensor 5 are inputted to a temperature difference sensing part 6 so as to sense a temperature difference between the fed air temperature and the room temperature. At the discriminating control part, a range of angle to oscillate the vane 3 is set in response to the temperature difference, a vane driving part composed of a motor or the like is controlled to drive the vane 3.

Description

[Detailed description of the invention] [Industrial application field]

TECHNICAL FIELD The present invention relates to an air conditioner that includes an air blower having an outlet for sending air into a room, and in which the outlet opens into a ceiling surface.

[Conventional technology]

BACKGROUND ART Conventionally, this type of air conditioner has been provided in which the outlet of the blower device opens into the ceiling surface. In such air conditioners, the standard for switching between cooling operation and heating operation is the room temperature, the temperature of the supply air sent into the room from the outlet, or the temperature of the supply air, which is independent of the room temperature or the supply air temperature. I have the elevator staff switch between cooling and heating mode depending on the season. By the way, a vane is attached to the air outlet of the blower device to adjust the direction of airflow, and by swinging the vane, the temperature distribution in the room is made almost uniform. Here, near the area directly below the outlet, the temperature changes in a relatively short time due to the supply air sent out from the outlet, but in areas far away from the outlet, it takes a comparatively long time for the temperature to change due to the supply air. It takes a long time. Therefore, the reciprocating movement of the vanes is temporarily stopped at both end positions when the vanes are reciprocated to change the blowing direction of the supply air, so that the supply air is distributed almost uniformly throughout the room. Hereinafter, such an operation will be referred to as an intermittent reciprocating operation.

[Problem to be solved by the invention]

Generally, when the room temperature is higher than the supply air temperature, the supply air tends to fall downward in the room, so it is desirable to change the direction of supply air blowing over a wide angular range, and when the room temperature is lower than the supply air temperature, Since the supply air tends to rise upwards in the room, it is desirable to change the blowing direction of the supply air within a narrow angular range centered on the direction directly below. However, among the above configurations, in configurations that only measure room temperature or supply air temperature, or switch between cooling operation and heating operation depending on the season, it is not possible to know the magnitude relationship between room temperature and supply air temperature. There is a problem in that it is not possible to determine in what angle range the blowing direction should be changed. Furthermore, if we consider the daily changes in the indoor temperature of a building equipped with an air conditioner, for example in the summer, the temperature changes as shown in Figure 5. That is, in the morning when not much time has passed since the air conditioner was started, the average room temperature (actual a) is higher than the supply air temperature (dashed line), but as the air conditioner operates, the supply air temperature and room temperature gradually become close to each other. On the other hand, indoors near the window on the west side, the room temperature is lower than the average room temperature in the morning and rises more than the average room temperature in the evening, as shown by the dashed line in FIG. Therefore, the supply air temperature can always be set lower than the average room temperature, but near the window on the west side of the room, the supply air temperature may be lower or higher than the room temperature. In other words, it would normally be desirable to set the supply air blowout direction according to each location in the room, but if the season is used as a standard, the supply air blowout direction cannot be determined. There's a problem. The present invention aims to solve the above-mentioned problems, and by setting the angular range for adjusting the blowing direction of the supply air from the outlet based on the difference between the room temperature and the supply air temperature, it can be adjusted depending on the season etc. The aim is to provide an air conditioner that maintains a nearly uniform room temperature regardless of the situation.

[Means to solve the problem]

In order to achieve the above object, the present invention includes a vane that adjusts the blowing direction of air at the outlet of the blower, and a vane that drives the vane back and forth so that the blowing direction changes within a predetermined angular range. A drive unit, a supply air temperature sensor that detects the temperature of the supply air sent into the room from the outlet, a room temperature sensor that detects the indoor temperature, and a blowout direction that is determined based on the temperature difference between the supply air temperature sensor and the room temperature sensor. It is equipped with a judgment control section that switches the changing angle range.

[Effect]

According to the above configuration, the angular range in which the blowing direction changes is changed based on the temperature difference between the room temperature and the supply air temperature, so when the room temperature is higher than the supply air temperature, the blowing direction is changed over a wide angular range. When the room temperature is lower than the supply air temperature, changing the blowing direction within a narrow angle range prevents the supply air from collecting at the top of the room. This can be prevented. As a result, the indoor temperature distribution can always be kept almost uniform regardless of the season.

【Example】

As shown in FIG. 2, a blower box 1 that is carried by an air blower is provided, and an air outlet 2 provided in the blower box 1 opens on the ceiling surface. A vane 3 is disposed inside the air outlet box 1 facing the air outlet 2. The vane 3 is a plate body that is rotatable around an axis parallel to the opening surface of the air outlet 2 and whose inclination angle with respect to the opening surface of the air outlet 2 is variable. By changing the inclination angle of the vane 3, the blowing direction of the supplied air can be changed. A supply air temperature sensor 4 for detecting the temperature of the supplied air is disposed inside the outlet box 1, and a room temperature sensor 5 for detecting the room temperature is disposed on the ceiling surface at a location away from the outlet 2. As shown in FIG.
The temperature difference between the supply air temperature and the room temperature is detected. Based on this temperature difference, the determination control section 7 sets an angular range for swinging the vane 3, and controls the vane drive section 8, which includes a motor, to drive the vane 73. Here, as explained in the section of the prior art, the vane 3 performs an intermittent reciprocating operation, and the amount of supply air sent out in a direction different from the direction directly below is larger than the amount of air supply sent out directly below. It's meant to be. The vane 3 is shown in FIG.
) As shown in (b), it is possible to switch between two states: a state in which the blowing direction of the supply air is varied within a wide angular range θ1, and a state in which the blowing direction of the supplied air is varied within a narrow angular range θ2. Switching between the two types of states described above is performed as follows. That is, as shown in Fig. 4, (room temperature - supply air temperature) is determined, and a threshold value is set based on the temperature difference. That is, the threshold values include a first threshold value t and a second threshold value t2, each of which is O
'C and 1 to 3°C. When the room temperature is lower than the supply air temperature, the blowing direction is changed within a narrow angle range θ2, and when the room temperature reaches its upper limit and the difference from the supply air temperature exceeds the second threshold t2, the blowing direction is changed within a wider angle range θ. Make the direction change. When the room temperature falls and the difference from the supply air temperature falls below the first threshold t1, the blowing direction is changed again within a narrow angle range θ2. In this way, the vane drive unit 8 is controlled so that when (room temperature - supply air temperature) exceeds the first threshold tI, the angle range is wide θ1, and when it becomes smaller than the second threshold t2, the angle range is narrowed θ2. be. Also,
Since the threshold values are set in two stages differing by 1 to 3°C to provide hysteresis, variations in the supply air temperature sensor 4 and the room temperature sensor 5 can be absorbed.

【Effect of the invention】

As described above, the present invention includes a vane drive unit that includes a vane that adjusts the blowing direction of air at the outlet of the blower device, and that drives the vane back and forth so that the blowing direction changes within a predetermined angular range; A supply air temperature sensor that detects the temperature of the supply air sent into the room from the outlet, a room temperature sensor that detects the indoor temperature, and an angular range in which the blow direction changes based on the temperature difference between the supply air temperature sensor and the room temperature sensor. The system is equipped with a judgment control section that switches the air flow direction, and switches the angular range in which the blowing direction changes based on the temperature difference between the room temperature and the supply air temperature, so when the room temperature is higher than the supply air temperature, the By changing the blowing direction over a wide angular range, the supply air is prevented from accumulating at the bottom of the room, and when the room temperature is lower than the supply air temperature, the blowing direction is changed over a narrow angular range to prevent the supply air This has the advantage of preventing water from accumulating in the upper part of the room. As a result, the indoor temperature distribution can be kept almost uniform regardless of the season.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is a schematic configuration diagram of the same as above, FIG. , FIG. 5 is an explanatory diagram showing the problems of the conventional example. 1...Blowout box, 2...Blowout outlet, 3...Vane, 4
... Supply air temperature sensor, 5... Room temperature sensor, 6... Temperature difference detection section, 7... Judgment control section, 8... Vane drive section.

Claims (1)

[Claims] (1) In an air conditioner that is equipped with a blower device that has an air outlet that sends air indoors, and the air outlet opens on the ceiling surface, the air outlet is provided with a vane that adjusts the air blowing direction, so that the air blowing direction can be adjusted. a vane drive unit that reciprocates the vane so as to vary within a predetermined angular range; a supply air temperature sensor that detects the temperature of the supply air sent indoors from the air outlet; and a room temperature sensor that detects the indoor temperature. An air conditioner comprising: a determination control section that switches an angular range in which the blowing direction changes based on a temperature difference between a supply air temperature sensor and a room temperature sensor.